15 sets of selected high school mathematics league simulation questions, and then there are related national high school mathematics league simulation questions in 2020, and 15 sets of national high school mathematics league simulation questions and so on.
These topics can be practiced. You can practice your hands with these questions before the exam to see where your level is.
For example, those with annual simulation questions may be closer to the real test difficulty. Then you can basically find these topics on the Internet, and you basically have to pay for downloading these topics.
Therefore, in the simulation questions of the national senior high school mathematics league, you can brush some of these questions, and after brushing these questions, you may have a full understanding of your level.